When combined with cards that force your opponents' creatures to block, you can use this to take them all out, since you only have to deal one damage to each of them
$8 seems like the floor for this card as long as the metagame doesnt shift considerably or a key piece is banned
Plus, even if your opponent does get something larger, Kefnet can just block it turn after turn
That will be followed by Hyperia City , which will feature cards inspired by movies such as Coco and Onward
You also get to capitalize on the red burn aspect, with haste, in a way that the multicolor decks sometimes scale back on due to their overreliance on green and blue
The ability to net mana by Gushing when you havent played a land for the turn and dont have one has been quite good in every format the card has been able to be played in